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Product Overview
A Blind Flange (BL Flange) is a solid flange without a bore, designed to close or terminate the end of a piping system. It is bolted to another flange using a gasket to create a tight, leak-proof seal. Blind Flanges are commonly used when future pipeline extensions, pressure testing, maintenance, or equipment isolation may be required.
At Moksh Tubes & Fittings LLP, we manufacture precision-engineered Blind Flanges using premium-quality forged materials and advanced CNC machining technology. Our flanges are available in a wide range of sizes, pressure classes, and material grades, making them suitable for high-pressure, high-temperature, and corrosive industrial applications.
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Specifications
| Specification | Details |
|---|---|
| Product | Blind Flange |
| Standards | ASME B16.5, ASME B16.47 (Series A & B), DIN, EN 1092-1, BS 4504, AWWA |
| Material | Stainless Steel, Carbon Steel, Alloy Steel, Duplex, Super Duplex & Nickel Alloys |
| Size Range | ½" to 48" (Custom Sizes Available) |
| Pressure Classes | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6 to PN64 |
| Facing Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| Manufacturing | Forged, CNC Machined |
Size & Weight Chart
Blind Flanges are manufactured according to ISO 4762 and DIN 912 standards and are available in a wide range of diameters and lengths.
| Nominal Pipe Size (NPS) | Outside Diameter (OD) - Class 150 (mm) | Thickness - Class 150 (mm) | Approx. Weight (kg) - Class 150 |
|---|---|---|---|
| 1/2" | 89.0 | 11.2 | 0.7 |
| 3/4" | 98.6 | 12.7 | 0.9 |
| 1" | 108.0 | 14.3 | 1.1 |
| 1½" | 127.0 | 17.5 | 1.8 |
| 2" | 152.4 | 19.1 | 2.7 |
| 3" | 190.5 | 23.9 | 5.4 |
| 4" | 228.6 | 23.9 | 7.7 |
| 6" | 279.4 | 25.4 | 11.8 |
| 8" | 342.9 | 28.4 | 21.3 |
| 10" | 406.4 | 30.2 | 31.8 |
| 12" | 482.6 | 31.8 | 49.9 |
| 16" | 596.9 | 36.6 | 83.9 |
| 20" | 698.5 | 42.9 | 133.8 |
| 24" | 812.8 | 47.8 | 190.5 |
Note: Dimensions and weights are for Class 150 RF Blind Flanges. Data for Class 300, 600, 900, 1500, and 2500, as well as RTJ and FF facings, are available upon request or in our datasheet.
Grades & Equivalent
Stainless Steel Grades
304 / 304L, 316 / 316L
Carbon & Alloy Steel
Carbon Steel, Alloy Steel Gr 12.9,
ASTM A193 B7, ASTM A320
L7
Duplex & Super Duplex
UNS S31803 / 2205
UNS S32750 / 2507
High-Performance Alloys
Inconel®, Monel®, Hastelloy® Alloys
Applications
Blind Flanges are widely used in:
Industrial Machinery
Automotive Industry
Aerospace Components
Oil & Gas Equipment
Petrochemical Plants
Power Generation Plants
Robotics & Automation
Tool & Die Manufacturing
Marine & Offshore Projects
Features & Advantages
Complete isolation of piping systems
Provides a secure, leak-proof seal
Withstands high-pressure and high-temperature environments
Available in RF, RTJ, and FF facings for versatile applications
Allows for easy pipeline inspection, modification, and maintenance
Precision CNC machined for accurate fitment and alignment
Excellent corrosion resistance for harsh industrial conditions
Long service life with reliable structural integrity
Manufactured to ASME, DIN, and AWWA international standards
Mechanical Properties
The mechanical properties of Blind Flanges depend on the selected material grade and comply with applicable ASTM, ISO, and DIN standards. The table below shows the typical mechanical properties for commonly supplied stainless steel grades.
| Property | SS 304 / 304L | SS 316 / 316L |
|---|---|---|
| Tensile Strength (MPa) | 515 Min | 515 Min |
| Yield Strength (MPa) | 205 Min | 205 Min |
| Elongation (%) | 40 Min | 40 Min |
| Hardness (HB Max) | 201 | 217 |
Note: Mechanical properties for Carbon Steel, Alloy Steel Grade 12.9, ASTM A193 B7, ASTM A320 L7, Duplex, Super Duplex, and Nickel Alloy Blind Flanges are available in accordance with their respective ASTM, ISO, and DIN material specifications upon request.
Why Choose Moksh Tubes & Fittings LLP?
Frequently Asked Questions (FAQ)
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Looking for a trusted Blind Flanges manufacturer and supplier? Contact Moksh Tubes & Fittings LLP for premium-quality industrial blind flanges, competitive pricing, ready stock, technical support, and fast worldwide delivery. Request your free quotation today.
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